CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents ($60,256 and $7,045 related to VIEs. See Note 12)	$ 170,385	$ 135,823
Customer retention deposits	1,000	481
Accounts receivable, net	358,175	388,000
Costs and estimated earnings in excess of billings	160,092	138,618
Inventory and uninstalled contract materials	40,922	49,201
Prepaid expenses and other current assets	12,640	18,985
Total current assets	743,214	731,108
Property and equipment, net	311,777	277,346
Intangible assets, net	44,800	32,841
Goodwill	153,374	127,226
Other long-term assets	2,575	2,046
Total assets	1,255,740	1,170,567
Current liabilities:
Accounts payable	140,943	168,110
Billings in excess of costs and estimated earnings	159,034	112,606
Accrued expenses and other current liabilities	111,387	108,006
Dividends payable	3,087	2,839
Current portion of capital leases	132	188
Current portion of long-term debt	65,464	58,189
Current portion of contingent earnout liabilities	716
Total current liabilities	480,763	449,938
Long-term capital leases, net of current portion	196	15
Long-term debt, net of current portion	193,351	203,150
Deferred tax liabilities	13,571	9,830
Other long-term liabilities	5,676	9,064
Total liabilities	693,557	671,997
Commitments and contingencies (See Note 13)
Stockholders' equity
Common stock—$.0001 par value; 90,000,000 shares authorized; 51,448,753 and 51,576,442 issued and outstanding at December 31, 2017 and December 31, 2016	5	5
Additional paid-in capital	160,502	162,128
Retained earnings	395,961	335,218
Noncontrolling interest	5,715	1,219
Total stockholders' equity	562,183	498,570
Total liabilities and stockholders' equity	$ 1,255,740	$ 1,170,567